Question | Answer |
Structural classification of all Diarthrodial joints | Synovial (most common type of joint found in human body) |
Types of Diarthrodial Joints | Arthrodial (Gliding)
Ginglymus (Hinge)
Trochoid (Pivot)
Condyloid (Knuckle)
Enarthrodial
Sellar(Saddle) |
Arthrodial Joint | Ex-Vertebral Facets, Intercarpal/Intertarsal joints
Motions- flexion, ext, abd, add, rot, circum
Degrees-Depends on the joint |
Ginglymus Joint | Ex-Knee, Elbow, Talocrural (ankle)
Motions-flex, ext
Degrees- Uniaxial, 1 degree of freedom |
Trochoid Joint | Ex-atlantoaxial, odontoid, proximal/distal radio-ulnar joints.
Degrees of Freedom- uniaxial, 1 degree of freedom |
Condyloid Joint | Ex- 2,3,4,5 metacarpophalangeal joints, radiocarpal joints
Motions- Flex, Ext, abd, add, circum, diag abd/add
Degrees of freedom-biaxial, 2
*Biaxial Ball and socket joint. Articular bones have concave and convex ends |
Enarthrodial Joint | Ex- Hip and Shoulder
Motions- flex, ext, abd, add, rot, circum
Degrees of freedom- Triaxial, 3
*Triaxial ball and socket joint |
Sellar Joint | Ex- 1st metacarpophalangeal
Motions- flex, ext, abd, add, circum, slight rot
Degrees of freedom- triaxial, 3
*Unique |